![Blue Trigger (Odonus niger)](http://www.lovecorals.com/cdn/shop/files/BLUETRIGGER_{width}x.jpg?v=1686767847)
The Blue Trigger, Odonus niger has a colour that can vary between dark blue, green or even purple with a lighter blue on the edges of the fins and on the face. The ideal aquarium should have rocks with several locations to be able to hide. It is a great addition to a Fish only tank. It should be fed with frozen fish or krill for example.